Envelop.



S. 1)-, GHELF.

'ENvzaLogl APPLICATION EILED JUNE 4, 1809.

Patented ln'far.I 22, 1910.

fll j SIMEO D. CHELF, 0F KENSINGTON, KANSAS.

ENVELOP.

Application filed June 4, 1909.

Specification of Letters Patent.

Patented Mar. 22, Milt).

Serial-No. 500,076.

To all whom, it may concern:

Be it known that. l. SinnoN l). Online, a citizen ot' the United States.residing at Kensington. in the county ot Smith, State ot' Kansas. haveinvented certain new and usel'ul improvementsl in llnvelops; and l doherebyY declare the 'lollowing to be a tull. clear` and exactdescription ol the invention, such as will enable others skilled in theart to which it appertains to malte and use the saine.

This invention relates to envelops of the class wherein provision isinade t'or rein- `toreing the sealing portion.y to prevent' traetureduring transportation through the mails, and has 't'or its object toimprove the eonstruetion and increase the etiiciency and utility otdevices ot' this character.

With thisl and other' objects in view, tho invention consists in eertainnovel features ot construct ion as hereafter shown and described andthen speeitieally pointed out in the claim. and in the drawingsillustrative ot' the. preferred embodiment ot' the invention, Figure lis a view of the envelop ready to receive its contents. Fig. 2 is a`View of the envelop closed. Fig. 3 is a. section on the line 1l- 3 ot'Fig. 1. Fig. l is a section on the line lst ot Fig. Q.

The improvement comprises an attaolr nient which mayv be applied to anyenvelop having a sealing flap, and t'or the purpose ot' illustration isshown applied to a eonven tional envelop comprisinga front portion 10,end flaps 11n-l., back flap 13, and with a, closure flap let. The backllap 13 provided with a longitudinally extending; slit t5a and the,closure Hap 14 1s provided with a. lsimilar slit 16, the formation ofthe slits in the envelop being the only change made therein.

A strip 17 forms a part of the improvement and is provided with adhesivematerial ndieated at 18 upon one face. The strip is inserted through theslit 15 into the interior ot the envelop andextended to a point near thet'oldiney line. It) between the front portion 10 and the elosure flap14, and the remainder of the strip extending over the baci: l'lap 13, aslshown in Figs. 1 and When the strip is inserted as shown in Figs. 1 and3 the adhesivo material whieh bears lazagainst the inlterior ot' the endflaps and adhere thereto. In this condition the envelops are. furnishedto the trade, and after the contents have been inserted the elosure flap1l is closed in the usual manner and sealed by moistening the adhesivematerial indicated at 21. 'lhe exposed portion of the strip il is thenmoistened' and folded along` the line indicated by the dotted line 1?()and inserted through the slot 1o and forced inwardly over the interiorportion ot the strip into the position shown in Fig. 2 and pr sureapplied to Cause the two portions ot' the strip t'o adhere and also tocause the stri p to adhere to the overlapping portions ot the back tlapand closure tlaps. By this means the envelop is etiee'tually reinforcedand strengthened at the weakest point, and the point. which is mostliable to be fractured during transit through the mails.

the strip 1T will preferably he of tough material, which is capable ot'withstandingl severe tearing strains, and ma.)Y be ot eloth or like.fabric it preferred. For some forms of envelops the strip willpreferably be of cloth or like material, and it is not desired thereforeto limit the, invention to any .specilie material for the strip.

The improved device is simple in con` struction, can be attached toenvelopsatL slight increase of expense, and will operate etl'eetuallyfor the purposes described, and

preserve the eontents of the envelop troni damage durin transit.

`What is claimed is An envelop including,` a. back tlap and a closureflap provided respectively with slits which are spaced apart when theenvelop is closed, and a Sealing strip havingan adhesive upon one sidesaid strip extendingthrough the slit of the back with one end extendingto a-point near the fold ot' the closure flap and exposed when theenvelop is open and sealed against the inner tace et' the back of theenvelop and the tree end of the sealing flap inserted through the slit.ot. the closure flap when the elosure lap is closed and sealed upon theclosure flap and the exposed end ot' the strip.

In testimony whereof, l atlix my signin ture, in presence. ot' twowitnesses.

SMEON l). CHEM?.

Witnesses:

JAMES lV. (in wnnnonz, LUCY Y.limnnnn

